diff --git a/api/od.py b/api/od.py
index 2740772..ffdef1c 100644
--- a/api/od.py
+++ b/api/od.py
@@ -5,6 +5,7 @@ from services.primitives.boolean_type import Boolean
 from services.primitives.integer_type import Integer
 from services.primitives.string_type import String
 from services.primitives.actioncode_type import ActionCode
+from services.primitives.bytes_type import Bytes
 from uuid import UUID
 from typing import Optional
 from util.timer import Timer
@@ -41,6 +42,7 @@ class ODAPI:
         self.create_integer_value = self.od.create_integer_value
         self.create_string_value = self.od.create_string_value
         self.create_actioncode_value = self.od.create_actioncode_value
+        self.create_bytes_value = self.od.create_bytes_value
 
         self.__recompute_mappings()
 
@@ -208,6 +210,8 @@ class ODAPI:
                 tgt = self.create_actioncode_value(name, value)
             else:
                 tgt = self.create_string_value(name, value)
+        elif isinstance(value, bytes):
+            tgt = self.create_bytes_value(name, value)
         else:
             raise Exception("Unimplemented type "+value)
         self.__recompute_mappings()
@@ -235,6 +239,10 @@ class ODAPI:
                 if to_overwrite_type != "String":
                     raise Exception(f"Cannot assign string value '{value}' to value of type {to_overwrite_type}.")
                 String(referred_model, self.state).create(value)
+        elif isinstance(value, bytes):
+            if to_overwrite_type != "Bytes":
+                raise Exception(f"Cannot assign bytes value '{value}' to value of type {to_overwrite_type}.")
+            Bytes(referred_model, self.state).create(value)
         else:
             raise Exception("Unimplemented type "+value)
 
diff --git a/bootstrap/primitive.py b/bootstrap/primitive.py
index 853b552..4e2b36f 100644
--- a/bootstrap/primitive.py
+++ b/bootstrap/primitive.py
@@ -47,7 +47,7 @@ def bootstrap_constraint(class_node, type_name: str, python_type: str, scd_root:
     bottom.create_edge(constraint_node, scd_node, "Morphism")
     bottom.create_edge(constraint_link, scd_link, "Morphism")
     
-def bootstrap_primitive_types(scd_root, state, integer_type, boolean_type, float_type, string_type, type_type, actioncode_type):
+def bootstrap_primitive_types(scd_root, state, integer_type, boolean_type, float_type, string_type, type_type, actioncode_type, bytes_type):
     # Order is important: Integer must come first
     class_integer    = bootstrap_type("Integer",    scd_root, integer_type,    state)
     class_type       = bootstrap_type("Type",       scd_root, type_type,       state)
@@ -55,6 +55,7 @@ def bootstrap_primitive_types(scd_root, state, integer_type, boolean_type, float
     class_float      = bootstrap_type("Float",      scd_root, float_type,      state)
     class_string     = bootstrap_type("String",     scd_root, string_type,     state)
     class_actioncode = bootstrap_type("ActionCode", scd_root, actioncode_type, state)
+    class_bytes      = bootstrap_type("Bytes",      scd_root, bytes_type,      state)
 
     # Can only create constraints after ActionCode type has been created:
     bootstrap_constraint(class_integer,    "Integer",    "int",   scd_root, integer_type,    actioncode_type, state)
@@ -63,3 +64,4 @@ def bootstrap_primitive_types(scd_root, state, integer_type, boolean_type, float
     bootstrap_constraint(class_float,      "Float",      "float", scd_root, float_type,      actioncode_type, state)
     bootstrap_constraint(class_string,     "String",     "str",   scd_root, string_type,     actioncode_type, state)
     bootstrap_constraint(class_actioncode, "ActionCode", "str",   scd_root, actioncode_type, actioncode_type, state)
+    bootstrap_constraint(class_bytes,      "Bytes",      "bytes", scd_root, bytes_type,      actioncode_type, state)
diff --git a/bootstrap/scd.py b/bootstrap/scd.py
index cac04c6..fb94b21 100644
--- a/bootstrap/scd.py
+++ b/bootstrap/scd.py
@@ -32,6 +32,7 @@ def bootstrap_scd(state: State) -> UUID:
     float_type_root = create_model_root(bottom, "Float")
     type_type_root = create_model_root(bottom, "Type")
     actioncode_type_root = create_model_root(bottom, "ActionCode")
+    bytes_type_root = create_model_root(bottom, "Bytes")
 
     # create MCL, without morphism links
 
@@ -132,7 +133,8 @@ def bootstrap_scd(state: State) -> UUID:
         float_type_root,
         string_type_root,
         type_type_root,
-        actioncode_type_root)
+        actioncode_type_root,
+        bytes_type_root)
     # bootstrap_integer_type(mcl_root, integer_type_root, integer_type_root, actioncode_type_root, state)
     # bootstrap_boolean_type(mcl_root, boolean_type_root, integer_type_root, actioncode_type_root, state)
     # bootstrap_float_type(mcl_root, float_type_root, integer_type_root, actioncode_type_root, state)
diff --git a/concrete_syntax/textual_od/parser.py b/concrete_syntax/textual_od/parser.py
index b679210..35ca933 100644
--- a/concrete_syntax/textual_od/parser.py
+++ b/concrete_syntax/textual_od/parser.py
@@ -21,6 +21,7 @@ literal: INT
        | STR
        | BOOL
        | CODE
+       | BYTES
        | INDENTED_CODE
 
 INT: /[0-9]+/
@@ -28,6 +29,8 @@ STR: /"[^"]*"/
    | /'[^']*'/
 BOOL: "True" | "False"
 CODE: /`[^`]*`/
+BYTES: /b"[^"]*"/
+      | /b'[^']*'/
 INDENTED_CODE: /```[^`]*```/
 
 type_name: IDENTIFIER
@@ -67,7 +70,7 @@ def parse_od(state,
 
     primitive_types = {
         type_name : UUID(state.read_value(state.read_dict(state.read_root(), type_name)))
-            for type_name in ["Integer", "String", "Boolean", "ActionCode"]
+            for type_name in ["Integer", "String", "Boolean", "ActionCode", "Bytes"]
     }
 
     class T(Transformer):
@@ -89,6 +92,10 @@ def parse_od(state,
         def CODE(self, token):
             return (_Code(str(token[1:-1])), token.line) # strip the ``
 
+        def BYTES(self, token):
+            # return (bytes(token[2:-1], "utf-8"), token.line)  # Strip b"" or b''
+            return (bytes(token[2:-1], "utf-8"), token.line)  # Strip b"" or b''
+
         def INDENTED_CODE(self, token):
             skip = 4 # strip the ``` and the following newline character
             space_count = 0
diff --git a/concrete_syntax/textual_od/renderer.py b/concrete_syntax/textual_od/renderer.py
index a3fc030..fae1e72 100644
--- a/concrete_syntax/textual_od/renderer.py
+++ b/concrete_syntax/textual_od/renderer.py
@@ -9,7 +9,7 @@ def render_od(state, m_id, mm_id, hide_names=True):
     
     m_od = od.OD(mm_id, m_id, state)
 
-    serialized = set(["Integer", "String", "Boolean", "ActionCode"]) # assume these types always already exist
+    serialized = set(["Integer", "String", "Boolean", "ActionCode", "Bytes"]) # assume these types always already exist
 
     def display_name(name: str):
         # object names that start with "__" are hidden
diff --git a/services/od.py b/services/od.py
index 3b8700a..816b225 100644
--- a/services/od.py
+++ b/services/od.py
@@ -5,6 +5,7 @@ from services.primitives.integer_type import Integer
 from services.primitives.string_type import String
 from services.primitives.boolean_type import Boolean
 from services.primitives.actioncode_type import ActionCode
+from services.primitives.bytes_type import Bytes
 from api.cd import CDAPI
 from typing import Optional
 
@@ -147,6 +148,13 @@ class OD:
         actioncode_t.create(value)
         return self.create_model_ref(name, "ActionCode", actioncode_node)
 
+    def create_bytes_value(self, name: str, value: str):
+        from services.primitives.bytes_type import Bytes
+        bytes_node = self.bottom.create_node()
+        bytes_t = Bytes(bytes_node, self.bottom.state)
+        bytes_t.create(value)
+        return self.create_model_ref(name, "Bytes", bytes_node)
+
     # Identical to the same SCD method:
     def create_model_ref(self, name: str, type_name: str, model: UUID):
         # create element + morphism links
@@ -389,6 +397,8 @@ def read_primitive_value(bottom, modelref: UUID, mm: UUID):
         return Boolean(referred_model, bottom.state).read(), typ_name
     elif typ_name == "ActionCode":
         return ActionCode(referred_model, bottom.state).read(), typ_name
+    elif typ_name == "Bytes":
+        return Bytes(referred_model, bottom.state).read(), typ_name
     else:
         raise Exception("Unimplemented type:", typ_name)
 
diff --git a/services/primitives/bytes_type.py b/services/primitives/bytes_type.py
new file mode 100644
index 0000000..04f001d
--- /dev/null
+++ b/services/primitives/bytes_type.py
@@ -0,0 +1,24 @@
+from uuid import UUID
+from state.base import State
+from services.bottom.V0 import Bottom
+
+
+class Bytes:
+    def __init__(self, model: UUID, state: State):
+        self.model = model
+        self.bottom = Bottom(state)
+        type_model_id_node, = self.bottom.read_outgoing_elements(state.read_root(), "Bytes")
+        self.type_model = UUID(self.bottom.read_value(type_model_id_node))
+
+    def create(self, value: bool):
+        if "bytes" in self.bottom.read_keys(self.model):
+            instance, = self.bottom.read_outgoing_elements(self.model, "bytes")
+            self.bottom.delete_element(instance)
+        _instance = self.bottom.create_node(value)
+        self.bottom.create_edge(self.model, _instance, "bytes")
+        _type, = self.bottom.read_outgoing_elements(self.type_model, "Bytes")
+        self.bottom.create_edge(_instance, _type, "Morphism")
+
+    def read(self):
+        instance, = self.bottom.read_outgoing_elements(self.model, "bytes")
+        return self.bottom.read_value(instance)
\ No newline at end of file